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Date: Wed, 11 Jun 2025 19:40:08 +0300
From: Jarkko Sakkinen <jarkko@kernel.org>
To: Yeoreum Yun <yeoreum.yun@arm.com>
Cc: sudeep.holla@arm.com, peterhuewe@gmx.de, jgg@ziepe.ca,
	stuart.yoder@arm.com, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org
Subject: Re: [PATCH v2 0/2] fix failure of integration IMA with tpm_crb_ffa
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On Tue, Jun 10, 2025 at 04:22:04PM +0100, Yeoreum Yun wrote:
> > OK, if ffa_init() is leveled up in the initcall hierarchy, shouldn't
> > that be enough as long as ko's can be found from initramfs?
> 
> As you mentioned, this is handled in Patch #1.
> However, although ffa_init() is called first,
> unless tpm_crb_ffa_init() is also invoked,
> crb_acpi_driver_init() will fail with -EPROBE_DEFER.
> 
> Please note that IMA is always built-in and cannot be built as a module.

Sure but if one needs IMA, then tpm_crb_ffa can be compiled as built-in
with zero code changes.

BR, Jarkko